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Drive position control system of large forging hydraulic motor beam

Author: XiongHuanHuan
Tutor: HuangMingHui
School: Central South University
Course: Mechanical and Electronic Engineering
Keywords: Forging hydraulic press Position control Fuzzy Adaptive PID PLC Host computer
CLC: TP273
Type: Master's thesis
Year: 2010
Downloads: 121
Quote: 1
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Abstract


Large-scale high-precision die forgings, aircraft manufacturing, key components in the production of aerospace industry, heavy precision forging hydraulic press is the key equipment to ensure the quality of these die forgings, precision of moving beam drive and position control system directly determines the quality of the die forgings . Large forging hydraulic machine with a high-pressure, big flow, multi-point parallel drive large inertia amount and other characteristics of the system in the large inertia large stroke rapid movement will cause overshoot oscillations generate strong impact, and reduce the movement of dynamic accuracy and working smoothly sex. In order to achieve high-precision position control, improve equipment overall ability to work, and this article to move the beam drive and position control system for the study of objects around the control mechanism to control the overall program, the control strategy. The main research contents are as follows: (1) analysis of the control technology and control systems and other aspects of the status quo and development of hydraulic press at home and abroad, proposed moving beam drive and position control of the overall program. The entire system is composed of three parts driven hydraulic system, position detection system, electrical control system, constructed based on bus technology, main program from the the station structure distributed two computer moving beam position control system and PC monitoring system. (2) forging hydraulic press hydraulic drive system and moving beam targeted analysis of the mathematical model. In consideration of the compressibility of the fluid, the viscosity resistance, leakage and other factors of the basis, the establishment of the dynamic model of the drive system of the movable beam, using the transfer function block diagram of a mathematical model of the system, and the system model parameters were determined. By analyzing the system static and dynamic performance of the three parameters of PID controller and fuzzy control theory, fuzzy adaptive PID controller is designed to focus on its implementation. Were analyzed using MATLAB fuzzy logic toolbox and simulink PID control and fuzzy adaptive PID control algorithm. (3) to complete the design of the control platform with PLC fuzzy adaptive PID control algorithm, multi-window classification based on the topology, PC monitoring system using WinCC configuration software design and development, forging hydraulic motorized beam position control system. (4) the completion of the commissioning work of forging hydraulic press test platform. Comparative analysis of the different control strategies of the same kinds of working conditions and the same kind of control strategy in the control effects of different operating conditions, studies have shown that the system uses fuzzy adaptive PID controller, fast response, high accuracy position control, significantly superior to the PID controller, the low speed of the moving beam control effect is better than high-speed operation, the location of the moving beam control accuracy of 0.1-0.2mm.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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